Island



J. B; GLENNoN May 16, 1933. INDICATOR v Re. 18,830

original Filed May 28, 1930 3 Sheets-Sheet 2 gwuentoz (hbox/mq J. B.GLENNON INDICATOR Re. 18,830

3 Sheets-Sheet 3 May 16, 1933.

Original Filed May 28, 1930 Reissued May 16, 1933 UNITED STATES PATENTOFFICE JAH-ES iB. GLENNON, OF SAN DIEGO, CALIFORNIA, ASSIGNOR, BY MESNEASSIGNMENTS,L

TO LEWIS R. SMITH, RECEIVER OF APCO MOSSBERG CORPORATION, A CORPORATIONOF RHODE ISLAND INDICATOR Original No. 1,809,934, dated June 16, 1931,Serial No. 456,591, led May 28, 1930. Application .for reissue ledFebruary 17, 1933. Serial No. 658,385. j 1

My invention consists in a new and useful improvement in indicators forfacilitating the steering of automob1les into parking spaces parallelwith the street curbs. The

device embodying my invention comprises an indicator placed upon theinstrument board ofthe automobile where it is readily observable by thedriver, and having one pointer which is moved to and fro by the movementof the wheels of the automobile and a second pointer which is moved toand fro by the movement of the steering wheel of the automobile. Mydevice is so designed that it is put into operation only when theautomobile is in the initial position for the process of parking itparallel with a. curb, and the device becomes inoperative automaticallywhen the parking process has been completed.

' My device is intended to serve as a means for solving the problem ofsteering a car into av limited parking space between two other carsalready parked parallel with the curb, a situation often confronting adriver desiring to park his car in an area of congestion.

- To park a car in such a limited space, the

driver must place his car parallel with the car forward of the vacantspace, and then back his car into the space. To perform this maneuvermost efficient-ly .requires the determination of the most advantageousangle of approach for the ,car to the vacant space when the car is beingbacked. It is obvious that this angle depends upon the length of the carand its position relative to the parked car, at the beginning of theparkingy process. Under the ordinary practice of this process of parkingthis angle is determined by the trial and error method, the -driver'placing his car at approximately the most desirable positi-on andguessing at the most desirable angle for backing. By such hit and misspractice, the success of the maneuver is extremely doubtful. The use ofmy device is designed to indicate to the driver the proper intialposition and the most desirable angle by which to back into the space,and also the proper manipulation ofthe steering wheel to complete theprocess by bringing the car to a position parallel with the curb.

-When using my device, the*V driver places his car parallel with thecurb and so related to the car in front of the'vacant space that as thedriver sits athis steering wheel he is Vopposite the rear bumper of theparked car.l

He then puts my device' into operation, con-A tinues to drive forward onthe same course, and my device then indicates the proper point for thedriver to stop Iand begin backing. This indication is given bythepointer which is actu ated by the wheels of the car, the position ofthis pointer showing when the rear wheels are in the most advantageousposition for the beginning of the rearward movement. When the car isbacked, thispointer moves to a certain positionrin my indicator,- andWh-en the driver by turning the steering wheel moves the second pointerto coincide with the first pointer, the front wheels of the car are inthe proper position to cause the car to move rearwardly into the space.

A particular advantage of my device is the fact that the objectionablefeature of having to change the direction of the front wheels by turningthe steering wheel while the car is not moving is eliminate-d, sincewhen using my device the direction of the front wheels is changed while.the car is moving.

In the drawings filed herewith and the detailed description of theconstruction therein illustrated, I have shown one specific embodimentof my invention, but it is to be ydistinctly understood that I do notconsider my invention limited to said specific embodim-ent, but referfor its scope tothe claims appended hereto. f

In the drawings: Fig. 1 is a vertical section of the line 1,-1 ofFigS;vi j z Fig. 2 is a horizontal section Aonthe line 2-2ofFig.1; l e f Fig.3 isa side elevation on the line 3-3 of Fig.r l; i

Fig. 4 is an enlarged section of a detail on the line 44 of Fig. 1; andn Fig. 5 is a diagrammatic view, indicating the lines of travelA of therear wheels of the automobile when my device is inl use.

In the embodiment of my device` illustrated in the drawings, I providetwo plates 1 and 2 suitably mounted behind the instrument board 3 of theautomobile which is provided With a suitable arcuate Window 4 throughWhich the indicators 5 and 6 of my devicelrflaybe observed. Theindicator 5'consists of' a serrated plate 7 having the four pointers 8,mounted upon a stem 9 suitably pivotdon'g tieinstrument board 3 andhav.-`

lgai segmental rack. 10 meshingfw'ith apinion 1,1 on the shaft 12 of thesteering post 13 of the automobile. that the indicator 5 is so relatedto the steering-gear of-"tle"automohile that the angularE disposition ofthe steering-lor" front Wheels`v ofitlie' iiirdic'ator'5'in the window4; I Y The lindic'atorf'6` is mountedupon asliding of the automobile isindicated bythe position lilo'cli` 14: 'suitablymountedin' an arcuateslot largement122 andidesignedjto r'et'urn'thel 'disc 19""to'n'ormakposition. Thedisc 19 has the ge'art2i5 which'` may be driven through theclutli' gear 26 by the driving gear 27 connected by any suitable formofdrive 28 with thetractionL WheelsY of.` the c automobile:y Thecliitclr'V gear 26 is loosely mounted upon t-hef rod'29ilietvveen" thethrust .collars4 30 and Therodf29"is"carried`in the'journal 32 on the iBracket 33E from the 'p'l'atef 1. Threaded to this journal 32; and'surrounding? the'upper endlof tl'ie-rod29g1 providefacap 34u11 whichismounted k,a spring 35 pressing upon the li'ead'3'6i'o'ther rod 29;Theqrod29 'is provided aititis'op'posite end with athiinble 37 receivedble373pressing* against" the cup38. Theend ofthe cup 38 projectsbeyondthe plate12- and forms the operating button for the mechan'isxn,as Will` belpresentlyexplained. The cup 38 is provided with a notch 43torl the latchl44" siidabl'e in'the collr'39 and actuated by the trigger45 pivotally mounted onthe enlargement" 22` and having' the spring 46 tohold the latch 44l in lockingposition; I1 provideacam 47 longthe'disc19"t'o Voperate the trigger 45 to cause the latch 44l to releasethecu'p'38 to allow the spring 42to leject the cup '38 inthejcollar*39.Vand permit the spring 35 to movethe rod29`iso as to causethe' clutchgax26'i h move out of'lmesli'w'ith the driving It is to be understood-fIt is obvious from the foregoing description of the details ofconstruction that when the disc 19 is rotated by its associated drivingmeans, the pin 17 being engaged in the slot 18 Yof the disc 19 andtheblocki14-being under theinfluence ofthe spring 16" which tends to drawthe block 14 toward the center tomofithe slot 18, andtherearetvvofinclinedy planes 49 and 50, one on eachside of" the' ledge 4e.yThe thro-aft 5121 ofthe-'Slee 18 'islecatedadj acentj the ledge j4'8fThel portion 52 of the slot' 18, extending Jclockwisefrom.the."

point' markedA AltFigy to the. point: marked'B, describes an arcconcentric 'with' the disc `19. Between the points. markedxB, Cand.Y,.tlie slot: 18has' an enlarged tri-A angularfopen space 53,' theWall 53faofithis open space' "53', toward the center of the discv 19,extending clockwise from' the point` m'arked"C 'to the point marked Y,.and* describing ana-rc concentric with the disc 19'.v The "portion" 54Vof the" slot Cto the point marked VD-inclines" to- Wardt'lie 'centerofrthe disc 19.` The portionH counter-.clock- 55vr of the slot18,'eXtending Wise from-the p ointmarkedmD to the pointl marked AE,describes an arc concentric With' 'Clie' diSCV 19.. extending!counter-clockwise' from the" point markedfE to thepoint marked F, 'in-`clines 'avv'ay from' the Vcenter ofthe `diisc`195 The portion ofthe'slot18, extendingfrom the pointmarked-F i y Gv, yd"escribes arc'concentricl with the dis'e19`, vThe portion'f58" of. the slot' 18,5ex-vtending counter-clockwise .from the point marke'dy G to thepo'iI'itLmar'kedE H, in-

s l 18",;` extending counter-clockwise from the pointinarkedl A"llu'eportion 56 ofA the slot 18,. 1

t'o the point marked clines tov'var'd tliefcenter of` the disc 19.".TheL l portion 59015` the s`1ot'f'18', extending ',counterl` cloclvvise"from the point markedi H 'to thelp'ointmarked X, describes anarcconcentric With thef'disc 19. Ait the point marked 5X, the "slot 18'opens throughfthe' periphery ofl the discv 19j; The po'rtioiil 601 oftheslot 18, extending,clockwise-fromme point"1narke'd"Y. to the pointmarked Z, describes i an' ar'cI concentricy withl the. disc 19 and formsa'continuation of thejwall 53-a' to the point: marked2 Z rWhere'the-s106182 opens throughthe periphery of the'di'sc 129;;

Y From the'zforegoing description of ,the deiZ tails"oftconstruction ofvmy device, itsopation :tvillfbe obvious. indicated"diaglravm-`ma'ticall'y'in Fig. 5, the drivenp'lacin'ghis car l'on the line Iparallel withthe curb K, proceedforward until he is opposite the rearend R of the car P. l This is indicated on the line I by the circlemarked A (Fig. 5.). As previously explained, my device is then put intooperation. At that time, the rear axle of the car isat the pointindicated on the line I by the circle marked A (Fig. 5), andvitpis to benoted that theidisc '19 being in normal position is so disposed that thepin 17 isV at the point marked A on the slot 18 (Fig. 1).

My device is put into operation by the driver pushing the -cup 38 untilitis locked byfthe'c'atch 44, causing the, spring 42 to move.; the rod29 againstV the spring 35 to carry-thevclutch gear 26`into` engagementvwith the driving gear27 and the driven gear 25, thus transmitting motionto the disc 19. It is to be noted that the gears 26 and 27 are greaterin -widththan the gear 25, so that the clutchv gear 26, as it moves,first engages thefgear 27 and then the gear 25.'

' The" car `proceeds forward until the rear axle reaches the pointindicated by the circle marked B (Fig. 5), at which time the movementcounter-clockwise of the 'disc 19, determined by the. distance travelledby the wheels ofthe car which drive the disc 19, has broughtthelpointmarked B on the slot 18 to the pin 17, at which point the pin 17 passesoil: of the inner side of the slot 18. The spring 16 causes the block 14to move across the window 4, the pin 17 being stopped by the wall53'-'a. .1 The indicator'is thus brought to the middle of the window 4,which is the signal for the driver to stop and begin backing thecanw YlItis to be noted that should the driver continue to drive the carforward, the disc 19 will continue to rotate counter-clockwise, thepin'17 hugging the wall 53-auntil it passes through the portion-60 oftheslot 18, and at the point Z 'passesv out and contacts thel periphery ofthe disc A19. Should this occur, thel disc 19 will have rotatedto sucha'point .thatthe cam 47 willtrip the trigger 45thus releasing.` the disc19 which will be returned toV normal position by theaction of the spring24.y The action ofthe trigger will also return the cup 38 to normalposition. When the :disc 19 is rotated clockwise by the action of thespring 24, the inclined-plane 49 passing-under the pin 17 vraises itonto the Vledge 48 opposite the throatv 51 and vby the action of thespring 16 the pin 17 is moved tothe pointv marked A, again in normalposition. It'will vbe seen, therefore, that should the driver continueto move thecar forward` beyondthe point'marked B (Fig. 5) asufficiently-long distance',r1"ny device will become automaticallyinoperative, and the parts will be restored toV normal position,'readytorepeat their'operation. v Y 'Howevelg shouldthe car not move forward asuicient distance to cause the disc 19 to tinue to hug the wall 53.-a asit passes the pin 17. It is obvious that when the driver, l

reversing the movement of the car, begins to back, the disc 19'willvbedriven clockwise,

the wall 53-a .moving inthe opposite direction past the pin 17.Therefore, should there have been any movement of the car forward, afterthe pin 17 came into contact with the wall 53-a, this is now compensatedby the corresponding rearward movement of the car. r Y

. The point C {(Fig. 1) is then brought to the pin 17 which now entersthe` portion 54 of the slot 18. At this time the rear axleof. the carhas reached the-point indicated by the circle marked C (Fig. 5). As theportion 54 passes the pinl17, the indicator is moved, by the spring16,.toward the right side of the window 4, the point D (Fig. 1)

is brought to the pin 17, and the rearaxle has,

reached the Apoint `indicated by the circle marked D (Fig. 5). Thebeginning of the movement of the indicator 6. from the middle of thewindow 4 toward the right of the` window 4 is the signal lto thedriverto adjust the front wheels of the Carso as to cause the car to assumethe proper angle for backing into the parking space. The driver makesthe correct adjustmentof the front wheels by turning the steering wheel,causing movement of the indicator 5, so that o neof the points 8 on theindicator 5 coincides with the position of the indicator 6. Y.

It is to be noted that in Fig. v5 thereare illustrated the lines L, M, Nand O, indicating the distances one foot,two feet, three feet and fourfeet, respectively, between ithe left edge Q of the parked car P and theAright edgeV of the driversfcar. If the driver, in placing his carin-the initial position for the parking process was on the line L, thatis tov say he found his car one foot from the carv P, he, then causeslthe point 8 designated by the numeral l on the plate 7 to coincide withthe point of the indicator 6. If, however, when the driver had placedhis car in the initial position he had found that it was on the line Mv,he causes the point 8 designated by the numeral 2 to coincide with thepoint ofthe indicator 6, and so for Athe lines N and O, and the points 8'designated as 3 and 4.

The continued backing "ofthe car,'a s the rearaxle moves. from lthepoint indicated by the -circle marked D to the point indicated by thecircle markedq (Fig.A 5), causes the ydisc 1 9 to rotate clockwisemoving the portion 55 of the Slot 18 past4 the pin 17 until the pointE(Fig. 1) reaches. the

pin 1 l?? .1 During' die-periodi when the vpin 17.; isdn' tlie aportion-55 ofi the l slotl V18,1 both-iindiLv caters;v 5' andi 61- arevmaintained iny the same'- portion- 56? oi? ftli'esloti 18" past the pin"11477, causingtheindicaton Gitomove across the window l1to1the middleIand-then-to the left sidfoftlie windbwfi sf the pointer' istliuaslmo'vedgk tliefdiiver" manipulating' the steeringlwlieel: moves#the indicatorf 51t'o correspondwvithtie`1 movement of the indica-v torlv{i} andftlussecuresltlieproper change' of? the ffontfw'lieels,i tbdcausethe car tot'urnt'o-v Ward-apositionl parallelvvithatlie curb"K.

When the rear axle has reached the point indicatedbytlie 'circlemankedmF f( Fig; 5 tlie xpoint markedMF f( Fig; 1) has reached tiiepin17;' andfthe portionl? of3 the 'sloti 18 tHen-'passesthepinF 17g dur-ingthe passage off Wliicliftheindicatrs and (ilareunaintained' inthesamel'position, andtlie car moves-rear waerdly onl thedsiredf curve,untilthe rear axlereaches tli'e point'y indicatedbyvtlie circle GW (Fig:1 reaciies1mepin 17; Then they portion'giofthejslot 18-passing therpin17'l causestiie'indicator'd to move tothe midi' dle oftliewindowltliedrivcr manipulating the steering' WlieelE toL cause theindicator 5tti-correspond with tHe indicator 6; thus securingtle proper*change'of-fA the front Wheels to' cause "the car'toassume' azpositionpar-allel" with4 tlie'cnrb"K,' Wlien therear axle reaches' the 'pointindicated by the circle mariedfH (Fig: 5)", andtle'pointf marked Hl'f-reaches tlie pin 17.

- Further baclin'gofg the car'for a` relatively sliort distance,`causesxtheportion 59 of" the slotlSto pass Vthepin '17, and I:when the-point X reachesthepinzlf thepin 17f'passes out and' contactsithe'periphery 'ofi therdiscfl9f When: diisr occurs, the disc, `19'.will have moved; to" suoli a .pointl that the j cam '47- willt1'ip^the'tri;l,`\9;e1"45'5v tlius releasing'the `disc whichA Willlle"returnedto normal-position'by the" action'ofthespringzi tlieinclinediplane 50"'passing under'the pin. 17; raisingit onto theledgeg4`8 opposite the throat 51, and by action oftlie springl'; theYpinl' is movedt'o' tiiepoint marked-, again'in normal postion.'.y f pHaving .described my Claims; 1 l e 1;. In' an. indicator` for adirigibl'e vehicle, the.combinationofianindicatingfmedium operatedli7the meansforsteeringthe vehicle; and an indicating' me'diumoperatedbyameclianicailY element"r of the vehicle in contact With-the surfacesupporting the f vehicle, the tivo"'iifidicating'g media being sorelated that by' the" operation off thel means' orsteering the'vehiclgthe -movcmentsof'tl-ie two'media may'lbecaused toconcid.- -f

invention', ,Y What- I 2;' YIn anlindicatorr' for adin'igblexvehiclqthe'confiloination` of aniindi'catimggelementop eratedbvthe means for steer-ing` tHe vehiclegl: and*l an' indicating elementoperated".l by." tractivemeans ofi/thev vehicle, the two indii eating'elements being S01 related-'tliatg Lby: the.x n

operation ofthej meansforf" steerin'g,. the? movements of tlie twoelements -m'aybef caused to coincide. i l

3'. In an` indicatorforiaf automobile, the? combination :offanLindi'catingelmentf; rm'eansz. actuated byv thevsteeringfwlieel;of'tnelantun mobile and adaptedto operate saidfelement; a secondiindicating element i; and meansi auf tuated bythe' wheels@ ofi theautomobilo'andi' adapted ftoperate f saidfsecondelementg the twoindicatingffelements. being-.i sof'related that", b'y AtheI'operation-ofthe" Steering Wheelg tlie move-ments ofrthe' twofelementsmay caused to-coincide:i 'l i Y Y .7:

4; In anindicatorl for! an automobilmwtho combination o famovablepointer; means fon movingv saidt pointer from the f steeringfwheel of?the automobile-fwhereby; :the-i positiony of the' 'pointer*corrfesponds'Y with e the Ppositon ofi' the front Wheels of theautomobile; afmov;v able indicator; and.A means operatedf the7 Wheelsof! the automobile :adapted topositionw the indicatori to indicate"the.' various@ posii tions-into Whichithe' pointerfmujst; moved bytheoperationI of tlief Steering` wheellto secure the properposition'- of?the front `Wheels-to vmove the caninfthe desired?manner.. 'Y Y Y 5; Inan= indicatori" fory an automobile; tlie combinationrof' a pointer;mounted tofmove'inr anarc; a connectionlbetween 'saidzpointeandf thesteering Wheel of the automobile wher the position ofthe pointerindicates the;4 ositionf of the fron't. Wheels`^ of .the automa le; anindicatori adapted fto fmovere im ani arc :conv centricwitlilthearcfofmovementoflthe point ergmean's operatedby thewleelsofth'efmitoa4 vmobilead'apted to position: the; indicator ai? a definitepo'inton thearciof it'tsmovemena each stage vin',v tlief desired'movement' of?F the4 automobile', vvto'linda-:atei the: position 1atvvhich'l the" pointer must positioned onzfits arcrof: movement byf theoperationtoff the: steering.'

wheel. to securexthe" proper positoni of theI fronti wheels oftheautomobilefati eachr stages' nthe desired. movem'entiof., the:automobile;`

6;- 1Inadevicefori indicating the rcourse ofi travel off an" automobileto; bev par'kednf. a' limitedf amount-'rofl parking space paralll- Withastreetcurb, Ithe' combination: ob=l servation; WindowF disposed upornthe f instru, mentlboalid of"l theautomobile ;iaz=plae behind' said'-WindowY and"pnov-ideril;Y withi` ai slota'r; a

on 'said `block5l the Window,4 ,'.slbt',.t lock: and pointer being soirelatedfv thatfthe movement ofthe pointer canfbe observedzthnoughztheWindow when the block slides'fimthesotkadisc mounted adjacent said plateand having a sinuous cam shoulder With Which said pin engages; a springmounted on said plate and said block adapted to cause said pin to engagesaid shoulder; means driven by the Wheels of the automobile adaptedtorotate said disc;

v a second pointer pivotally mounted adjacent said Window and sodisposed as to be movable in unison With said rst pointer; and meansoperated by the steering Wheel of the automobile and adapted to movesaid second pointer.

7 In an indicator for an automobile, the combination of an indicatingelement; means actuated by the steering Wheel of the automobile andadapted to operate said element; asecond indicating element; and meansactuated by the propulsive mechanism of the automobile and adapted tooperate said second element, the tWo indicating elements being sorelated that, by the operation of the steering Wheel, the movements ofthe two elements may be caused to coincide.

8. In an indicator Jfor an automobile, the combination of a movablepointer; means for moving said pointer from the steering Wheel of theautomobile whereby the position of the pointer corresponds with theposition of the front Wheels of the automobile; a movable indicator; andmeans operated by the propulsive mechanism of the automobile, andadapted to position the indicator to indicate the various positions intowhich the pointer must be moved by the operation of the steering Wheelto secure the proper position of the fro-nt Wheels of the automobile tomove the automobile in the desired manner.

9. In an indicator for an automobile, the combination of a pointermounted to move in an arc; a connection between said pointer and thesteering Wheel of the automobile whereby the position of the pointerindicates the position of the front Wheels of the automobile; anindicator adapted to move in an arc concentric with the arc of mo-vementof the pointer; means operated by the propulsive mechanism of theautomobile and adapted to position the indicator at a definite point onthe arc of its movement at each stage in the desired movement of theautomobile, to indicate the position at which the pointer must bepositioned on its arc of movement by the operation of the steering Wheelto secure the proper position of the front Wheels of the automobile ateach stage in the desired movei ment of the automobile.

10. In a device for indicating the course of travel of an automobile tobe parked in a limited amount of parking space parallel with a streetcurb, the combination of an observation Window disposed upon theinstrument board of the automobile; a plate behind said Window andprovided With a slot; a block slidably mounted in said slot; a pointeron said block, the Window slot, block and a sinuous cam shoulder withwhich said pin engages; a spring mounted on said plate and said blockadapted to cause said pin to engage said shoulder; means driven by thepropulsive mechanism of the automobile and .adapted to rotate said disc;a second pointer pivotally mounted adjacent said Window and so disposedas to be movable inv unison with said first pointer; and means operatedby the steering Wheel of the automobile and adapted to move said secondpointer.

11. In a device for indicating the course of travel lof an automobile,the combination of an observation Window; a plate behind said Window andprovided with a slot; a rotatable disc mounted adjacent said plate andhaving thereon an indicating medium; means driven by the Wheels of theautomobile adapted to rotate said disc, the parts' being so related thatthe movement of the disc displays thev indicating medium thereon throughsaid slot and Window; a pointer pivotally mounted adjacent said windowand so disposed as to be movable in unison with said indicating medium;and means operated by the steering Wheel of the automobile and adaptedto move said pointer.

12. In a device for indicating the course of travel of an automobile,the combination of an observation window; a plate behind said Window andprovided With a slot; a rotatable disc mounted adjacent said plate andhaving thereon an indicating medium; means driven by the propulsivemechanism of the automobile adapted to rotate said disc, the parts beingso related that the movement of the disc displays the indicating mediumthereon through said slot and Window; a pointer pivotally mountedadjacent said Window and so disposed as to be movable in unia son withsaid indicating medium; and means operated by the steering Wheel of theautomobile and adapted to move said pointer.

13. In combination with a motor vehicle having a steering element, meansincluding a movable index operated by the movement of the vehicle forautomatically indicating to the operator a proper sequence of movementof the steering element adapted to cause the vehicle to move laterallyinto a restricted space. v

14C. In combination with a motor vehicle having a movable steeringdevice, means including a movable index operated by the movement of thevehicle for automatically in dicating the directions in which thesteering device should be moved to produce a desired lateraldisplacement of the vehicle.

15. A device for assisting the lateral displacement o a vehicle througha series ot` ilo `forward and backward movements by indi- *catingthevarious positions of the vehicle at which a change -in such-movementsshould be made, which device includes a movable ele- -ment and meansoperated by-such movements -of the vehicle for actuating said element.

16. A device for assisting the lateral Vdisplacement of a vehiclethrough a series of Vforward and backward movements by indil)10 catingthe various positions of thevehicle jat lWhich-a cha-nge in suchmovements-should vbe made, which device includes a movableelement, andmeans relative to which the element 'fis moved'for advising the operatorwhen the '15 vehicle reaches one of'said positions.

17. A device for assisting the lateral displacement of a vehiclevthrough a series of lforward and `rbackward Vmovements by indicatingthe various positionsvof the vehicle at 20 `which achange in suchmovements-should be -made which device includes -a movableelement, meansoperated by the movement'of the vehicle for causing said element totravel in one direction from a fixed point, whereupon "5the vehicle isstopped and its direction of travel reversed and Ato travel in the otherdirection backto-said fixed point, and mea-ns "forrstopping the travelof the elementulpon its-return tosaid xed point.

:5310 Signed by me at San -Diego,fCalif.,thisf6 dayV of Feb., 1933. Y

JAMES B. GLENNON.

